OBDII Reader Dead

STEVE WEST

MEMBER

4 POSTS

2002 CHEVROLET ASTRO

135,000 MILES

OBDII reader used to work, now I get nothing, no lights or anything. This code reader still works in a different vehicle and used to work in this Astro van. Service engine soon light was coming on intermittently, an I lost power. Recognizing the symptom and sound, I removed oxygen sensors and had power restored so I could get home, so the Cat is at least part of the problem. So my question is why is the code reader dead? PCM is still working. It sends the "Service Engine Soon" to the dash and everything else seems to work in the vehicle. Is there a way to test the DLC? Maybe a diagram? I need this van to work and don't have much money.
Thank YOu

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Saturday, July 9th, 2011 AT 12:51 PM

8 Replies

WRENCHTECH

EXPERT

21,081 POSTS

Check all your fuses. The DLC probably isn't powered.

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Saturday, July 9th, 2011 AT 1:36 PM

CJ MEDEVAC

EXPERT

10,370 POSTS

Does the ole cigarette lighter work?

My sisters Tahoe, would not power up my scanner, until we replaced the lighters fuse.

Your owners manual or the fuse box covers may help you quickly identify fuses.

The Medic

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Saturday, July 9th, 2011 AT 1:59 PM

WRENCHTECH

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21,081 POSTS

I think I just said that.

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Saturday, July 9th, 2011 AT 2:01 PM

CJ MEDEVAC

EXPERT

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In my post, I may have saved someone from snatching out every fuse and eliminating them, from the equation.

How ever, I could be wrong, and I am willing to admit it, most of the time. ('Cept maybe the barn loft incident)

A Tahoe, may not be set up the same as his vehicle. And he may have to go thru the long elimination process, in which you prepped him for.

I feel it'll all come out in the end. Maybe he'll tell us which one, he found to be defective.

Watchin' out for you!

Love You Too!

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Saturday, July 9th, 2011 AT 2:43 PM

WRENCHTECH

EXPERT

21,081 POSTS

I intentionally left it out because many times it is not powered by the lighter fuse as in this case. So, you would have the customer looking all over creation for his problem thinking he already checked the fuse when my instructions would have not left anything out. This one is powered by fuse #7 in the instrument panel box which is auxiliary power and the audio amp.

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Saturday, July 9th, 2011 AT 4:48 PM

CJ MEDEVAC

EXPERT

10,370 POSTS

Both my Jeeps seem to be running well, drove both yesterday!

I just thought I could pipe in a little sunshine, into someone else's day.

I was told there was endless writing space in each of these threads. Room for everybody!

Many, many others here have disagreed with my fixes. Some were wrong too!

But normally they respond with, I disagree because of the following reasons. Never once have they "Called me Names" or "Tried to Degrade me or my Mission". In fact many respond with "Thanks For Your Input, But."

Behind my back, in messages might be a different story! Last time I was in there, was a nearly a Full set of "Standard and Metric" hanging on the wall!

A dealer or a paid mechanic is not the answer for every question you are tired of responding to. That's where I come in, I know the hidden corridors and back alleys that some people must resort to. Everybody don't make $35+ an hour to turn wrenches.

These people know, when it comes down to walking, a shop is their final destination. They come here, mostly to try to avoid that last option!

Mike told me to go forth throughout the site, and Help People all I can! No intentionally throwing out incorrect info allowed. Do this with all of my heart, and strength till death do us part!

So that's what I try to do.I try to hold their hand thru it all. If I can.I never give up on 'em.I just try to find another expert, that I know will have the same dedication to helpin', just with more knowledge on the subject!

Still Love You. Can you tell?

The Medic

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Saturday, July 9th, 2011 AT 5:38 PM

STEVE WEST

MEMBER

4 POSTS

Wrenchtech is the man! #7 fuse it was. Of course I checked fuses first before posting on this thread, but idiocy ruled that day and I checked not the fuse in question.
Now how about welding the stainless Cat I ordered to galvanized 3" to 2-3/4" reducer? If I grind off as much zinc from the galvanized as possible, will I get decent results? I'm a terrible welder.

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Sunday, July 10th, 2011 AT 9:38 AM

WRENCHTECH

EXPERT

21,081 POSTS

Glad to hear you found your problem. This is why I usually don't name specific fuses, because you should always test all fuses using a test light. That's the way I always do it. You never know what you're going to find. I'm afraid I'm not much help on the welding though. My welding looks like gorilla snot.